Which tool is known as a multi-tool used by technicians for various tasks such as prying out chips?

The correct choice is the Black Stick, which is a versatile tool that technicians commonly use for various tasks in Mac servicing, including prying out chips. It is designed to be non-conductive and non-marring, making it suitable for delicate operations without risking damage to the components. The Black Stick's design and material allow it to be effective in both accessing tight spaces and removing components safely.

In contrast, the other options serve different specific purposes and do not have the broader application offered by the Black Stick. The Hex Driver, for instance, is designed specifically for tightening or loosening screws with hexagonal heads but does not serve the purpose of prying or removal tasks effectively. The Static Bag is used to prevent electrostatic discharge (ESD) damage to sensitive electronic components, while the Magnetizer is intended for magnetizing or demagnetizing small metal tools or screws, but lacks the prying functionality essential for chip removal. This makes the Black Stick the go-to multi-tool for technicians in various servicing scenarios.